That specimen looks more like a Bushpig (Potamochoerus larvatus) then it does a Forest hog (Hylochoerus meinertzhageni)
Actually, vogelcommando is correct - this animal is an Ituri Forest Hog (Hylochoerus meinertzhageni ituriensis), one of 1,2 which arrived at Antwerpen in 1955. Amsterdam and Frankfurt received animals in the same import, I believe.
I guess the mane and shape of the snout along with the fact that this specimen dosnt have as much hair as a normal Giant forest hog led me to believe that I was looking at a Bushpig